Robin Boyd’s engagement with Japanese architecture was most prominently recorded in Kenzo Tange and New Directions in Japanese Architecture, but his relationship with Japan predated his writing on the subject, and extended beyond architectural criticism. The letters here provide a glimpse of Boyd’s personal and non-manuscript related correspondences during the 1960s, illustrating some of the relationships he developed in Japan. Letters from Bruce Anderson and architecture student Tamon Okubo point towards the impact of Australia-Japan cultural exchanges among architects in the early 1960s. A card from Kenzo Tange and letters of introduction that Boyd wrote for travelling Australians speaks to Boyd’s warm relationship with both Tange and Yoshinobu Ashihara. The itinerary for his 1969 visit to Japan highlights Boyd’s role as Exhibits Architect at Expo 70 in Osaka.